add tests

dart/test/gilded_rose_test.dart

@@ -2,12 +2,140 @@ import 'package:test/test.dart';
 import 'package:gilded_rose/gilded_rose.dart';
 
 main() {
-  test('foo', () {
-    var item = new Item('foo', 0, 0);
-    var items = <Item>[item];
-
-    GildedRose app = new GildedRose(items);
+  test('foo item', () {
+    GildedRose app = GildedRose([Item('foo', 0, 0)]);
     app.updateQuality();
-    expect("fixme", app.items[0].name);
+    var item = app.items[0];
+
+    expect(item.quality, 0);
+    expect(item.sellIn, -1);
+    expect(item.name, "bar");
+  });
+
+  test('+5 Dexterity Vest', () {
+    GildedRose app = GildedRose([Item('+5 Dexterity Vest', 10, 20)]);
+    app.updateQuality();
+    var item = app.items[0];
+
+    expect(item.sellIn, 9);
+    expect(item.quality, 19);
+    expect(item.name, '+5 Dexterity Vest');
+  });
+
+  test('Aged Brie', () {
+    GildedRose app = GildedRose([Item('Aged Brie', 2, 0)]);
+    app.updateQuality();
+    var item = app.items[0];
+
+    expect(item.sellIn, 1);
+    expect(item.quality, 1);
+    expect(item.name, 'Aged Brie');
+  });
+
+  test('Elixir of the Mongoose', () {
+    GildedRose app = GildedRose([Item('Elixir of the Mongoose', 5, 7)]);
+    app.updateQuality();
+    var item = app.items[0];
+
+    expect(item.sellIn, 4);
+    expect(item.quality, 6);
+    expect(item.name, 'Elixir of the Mongoose');
+  });
+
+  test('Sulfuras, Hand of Ragnaros', () {
+    GildedRose app = GildedRose([Item('Sulfuras, Hand of Ragnaros', 0, 80)]);
+    app.updateQuality();
+    var item = app.items[0];
+
+    expect(item.sellIn, 0);
+    expect(item.quality, 80);
+    expect(item.name, 'Sulfuras, Hand of Ragnaros');
+  });
+
+  test('Sulfuras, Hand of Ragnaros - 2', () {
+    GildedRose app = GildedRose([Item('Sulfuras, Hand of Ragnaros', -1, 80)]);
+    app.updateQuality();
+    var item = app.items[0];
+
+    expect(item.sellIn, -1);
+    expect(item.quality, 80);
+    expect(item.name, 'Sulfuras, Hand of Ragnaros');
+  });
+
+  test('Backstage passes to a TAFKAL80ETC concert', () {
+    GildedRose app =
+        GildedRose([Item('Backstage passes to a TAFKAL80ETC concert', 15, 20)]);
+    app.updateQuality();
+    var item = app.items[0];
+
+    expect(item.sellIn, 14);
+    expect(item.quality, 21);
+    expect(item.name, 'Backstage passes to a TAFKAL80ETC concert');
+  });
+
+  test('Backstage passes to a TAFKAL80ETC concert - 2', () {
+    GildedRose app =
+        GildedRose([Item('Backstage passes to a TAFKAL80ETC concert', 10, 49)]);
+    app.updateQuality();
+    var item = app.items[0];
+
+    expect(item.sellIn, 9);
+    expect(item.quality, 50);
+    expect(item.name, 'Backstage passes to a TAFKAL80ETC concert');
+  });
+
+  test('Backstage passes to a TAFKAL80ETC concert - 3', () {
+    GildedRose app =
+        GildedRose([Item('Backstage passes to a TAFKAL80ETC concert', 5, 49)]);
+    app.updateQuality();
+    var item = app.items[0];
+
+    expect(item.sellIn, 4);
+    expect(item.quality, 50);
+    expect(item.name, 'Backstage passes to a TAFKAL80ETC concert');
+  });
+
+  test('Backstage passes to a TAFKAL80ETC concert - quality capped', () {
+    GildedRose app =
+        GildedRose([Item('Backstage passes to a TAFKAL80ETC concert', 5, 50)]);
+    app.updateQuality();
+    var item = app.items[0];
+
+    expect(item.sellIn, 4);
+    expect(item.quality, 50);
+    expect(item.name, 'Backstage passes to a TAFKAL80ETC concert');
+  });
+
+  test('Backstage passes to a TAFKAL80ETC concert - value increase by two', () {
+    GildedRose app =
+        GildedRose([Item('Backstage passes to a TAFKAL80ETC concert', 9, 20)]);
+    app.updateQuality();
+    var item = app.items[0];
+
+    expect(item.sellIn, 8);
+    expect(item.quality, 22);
+    expect(item.name, 'Backstage passes to a TAFKAL80ETC concert');
+  });
+
+  test('Backstage passes to a TAFKAL80ETC concert - value increase by three',
+      () {
+    GildedRose app =
+        GildedRose([Item('Backstage passes to a TAFKAL80ETC concert', 5, 20)]);
+    app.updateQuality();
+    var item = app.items[0];
+
+    expect(item.sellIn, 4);
+    expect(item.quality, 23);
+    expect(item.name, 'Backstage passes to a TAFKAL80ETC concert');
+  });
+
+  test('Conjured Mana Cake', () {
+    GildedRose app = GildedRose([Item('Conjured Mana Cake', 3, 6)]);
+    app.updateQuality();
+    var item = app.items[0];
+
+    expect(item.sellIn, 2);
+    expect(item.quality, 4);
+    expect(item.name, 'Conjured Mana Cake');
   });
 }